Graphene/TiO2 composite positive electrode preparation method
A composite positive electrode and graphene technology, which is applied in positive electrodes, battery electrodes, active material electrodes, etc., can solve problems such as difficult industrial production, and achieve the effects of simple preparation process, reduced spontaneous agglomeration, and increased contact probability
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[0028] A kind of graphene / TiO of the present invention 2 Composite cathode (G / TiO 2 @NCM523) preparation method, comprises the following steps:
[0029] (1) Weigh 0.003g TiO 2 (particle size 60nm) and 10g N-methylpyrrolidone (NMP), ultrasonic 10min (ultrasonic power is 300W); then add 0.1g graphene, continue to adopt cell pulverizer ultrasonic dispersion 1h (ultrasonic power is 300W), obtain graphene / TiO 2 Dispersions;
[0030] (2) to graphene / TiO 2 Add 2g NCM523 (nickel cobalt lithium manganese oxide) positive electrode active material in the dispersion liquid, seal ball milling 40min under 300r / min (ball material ratio 20:1, adopt zirconia beads), resulting in graphene / TiO 2 Mixture with NCM523;
[0031] (3) Air-dry the mixed solution at 100°C for 72 hours, grind it, and pass through a 325-mesh sieve to obtain graphene / TiO 2 Composite cathode powder with NCM523, No. G / TiO 2 @NCM523.
[0032] The scanning electron microscope of the composite positive electrode is ...
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